"Focus on particular things, Focus on the time, Focus on the trend", it is a remedy for the ineffectiveness of the ideological and political education in colleges, emphasizing the change of educators driven by the needs of the students. "Focusing on particular things" means that we should focus on students' ideological concerns face the hot issues and narrate what happed in China well. "Focusing on the time" means that it is necessary to carry out the "supply-side" reform in light of characteristics of college students and the characteristics of the times of teaching objective conditions. "Focusing on the trend" means that it is essential to integrate the building of the ideological and political lessons into the general trend of the great rejuvenation of the Chinese nation, to enhance the "four self-confidence" of the students and meet the overall benefits of the growth and development of the college students. The theory of "Three Factors" conforms to the law of acceptance of college students' ideological and political education and has strong guidance and applicability for guiding the construction of ideological and political theories in colleges.